High School: 9th and 10th Grade - Chemistry - Atomic Structure 2 Solution

Q.1.

An element has 45 electrons around its nucleus. The element is...

Q.2.

Chlorine has two isotopes, one with atomic mass 35 and one with atomic massPick the correct combination of subatomic particles for the two isotopes.

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Cl 35 - 17 Protons; 17 Neutrons; 18 Electrons Cl 37 - 20 Protons; 17 Neutrons; 17 Electrons
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Cl 35 - 17 Protons; 18 Neutrons; 17 Electrons Cl 37 - 17 Protons; 20 Neutrons; 17 Electrons
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Cl 35 - 18 Protons; 18 Neutrons; 17 Electrons Cl 37 - 17 Protons; 18 Neutrons; 20 Electrons
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Cl 35 - 17 Protons; 17 Neutrons; 18 Electrons Cl 37 - 17 Protons; 20 Neutrons; 20 Electrons

Q.3.

Name the element that contains 12 protons, 12 electrons and 12 neutrons.

Q.4.

Pick the correct symbol for the element with the mass number 84.

Q.5.

Pick the name for the element with 6 electrons.

Q.6.

Pick the symbol pairs for elements that do NOT have the same number of neutrons in their nuclei.

Q.7.

There are two elements that are liquid at room temperature. They are...

Q.8.

An element has 2 electron shells with 6 electrons in its outer shell. Which element is it?

Q.9.

An element has 3 electron shells with 3 electrons in the outer shell. Which element is it?

Q.10.

If the temperature is increased to 100°C, which element does NOT become a liquid?